Shama-il Tirmidhi Chapter 6, Hadith Number 4 (47).

Anas Radhiallahu ‘Anhu says: “I saw that the hair of Rasulullah Sallallahu ‘Alayhi Wasallam had been dyed.”

As has been explained there are different narrations on the dying of the hair of Sayyidina Rasulullahu Sallallahu ‘Alayhi Wasallam. There is an apparent contradiction between this narration and the one mentioned in the first hadith of the previous chapter, where Sayyidina Anas Radiyallahu ‘Anhu denies Sayyidina Rasulullah Sallallahu’ Alayhi Wasallam used a dye. we may take both narrations to be correct, as they could have been narrated at an earlier and a later period.